Language peer sets for EXEC:
Designed 1974 ↑
1970s languages ↑
High Cold War↑
EXEC(ID:2023/exe002)alternate simple view
Country: United States
for EXtended EXecutor
Early batch language for IBM VM/CMS systems.
"Before computers were inexpensive enough for widespread individual ownership, they usually had to be shared by many people. IBM's most successful time-sharing operating system in the 1970s and 1980s was the VM/370 (Virtual Machine/370) operating system. This operating system provided a personal computer for each of its users through the Virtual Machine concept--very similar to the Virtual DOS Machines (VDMs) in OS/2.
Any System/370 operating system can run in a VM virtual machine; the most popular for interactive development is the Conversational Monitor System (CMS). CMS is a single-user operating system that borrowed many of its features from earlier systems such as Multics, including the concept of controlling the system by commands. CMS's command language is still one of the simplest and most readable ever devised.
Like other command-driven operating systems, CMS provides the ability to "wrap up" commands with a programming logic; initially, these simple programs were written in a language called EXEC. This language, though not much more advanced than the PC-DOS "Batch" language, allowed many enhancements and new commands to be written rapidly and much more easily than in the native assembler language used for writing low-level commands. "
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